Control method and device of automobile glass washing liquid level sensor and automobile

Abstract

The invention discloses a control method of an automobile glass washing liquid level sensor. The control method comprises the following steps: acquiring working condition information of an automobile; when the working condition information meets a first preset condition, starting to supply power to the glass washing liquid level sensor; when the power supply duration of the glass washing liquid level sensor is smaller than a first threshold value, obtaining a detection signal of the glass washing liquid level sensor; and when the power supply duration of the glass washing liquid level sensor is greater than or equal to a first threshold value, stopping supplying power to the glass washing liquid level sensor. The control method provided by the invention is combined with a detection scene of the glass washing liquid, a method for reasonably controlling the collection time of the glass washing liquid level sensor is provided, the working time of the glass washing liquid level sensor can be effectively shortened, and the risk of ionization corrosion is reduced.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a control method and device for a liquid level sensor for automobile glass washing liquid, and a vehicle. Background Art

[0002] With the development of electrification and intelligence of automobiles, many intelligent functions have been introduced to bring a lot of convenient experience to users. Among them, the washing liquid level reminder function reminds users in advance to replenish the glass water in time when the glass water is about to run out. The detection of the glass water level usually adopts a float sensor or uses liquid conductivity detection. The sensor using liquid conductivity detection uses two metal electrodes to energize to form a circuit in the liquid, which is easy to produce ionization corrosion on the metal motor, which will cause sensor failure over time. Complex drive circuits are required to avoid ionization failure, which also brings high costs. Summary of the invention

[0003] The present invention provides a control method, device and vehicle for a glass washer liquid level sensor for an automobile. By analyzing different working conditions of an automobile, it is selected whether to power the glass washer liquid level sensor. The method can effectively reduce the working time of the glass washer liquid level sensor and reduce the risk of ionization corrosion. The method does not use a complex circuit to realize the alternation of positive and negative poles, simplifies the difficulty of realizing the sensor acquisition circuit, and further reduces the working and time costs of the glass washer liquid level sensor.

[0004] According to a first aspect of the present invention, a control method for a liquid level sensor for a glass washer fluid of an automobile is provided, comprising:

[0005] Get the working condition information of the car;

[0006] When the operating condition information satisfies a first preset condition, power is supplied to the glass washing liquid level sensor;

[0007] When the power supply duration of the glass washing liquid level sensor is less than a first threshold, acquiring a detection signal of the glass washing liquid level sensor;

[0008] When the power supply duration of the glass washing liquid level sensor is greater than or equal to a first threshold, the power supply to the glass washing liquid level sensor is stopped.

[0009] Optionally, the first preset condition includes the moment when the voltage state of the vehicle changes from an off state to a power-on state.

[0010] Optionally, the first preset condition includes that the voltage state of the vehicle is in a power-on state and the vehicle receives a water spray trigger signal for glass washing liquid.

[0011] Optionally, when the power supply duration of the glass washing liquid level sensor is less than a first threshold, acquiring a detection signal of the glass washing liquid level sensor includes:

[0012] When the equivalent resistance in the glass washer fluid level sensor is less than a second threshold, it is determined that the glass washer fluid of the vehicle is in a sufficient state.

[0013] Optionally, when the power supply duration of the glass washing liquid level sensor is less than a first threshold, acquiring a detection signal of the glass washing liquid level sensor further includes:

[0014] When the equivalent resistance in the glass washer fluid level sensor is greater than or equal to a second threshold, it is determined that the glass washer fluid of the vehicle is in a shortage state.

[0015] Optionally, when the equivalent resistance in the glass washer liquid level sensor is greater than or equal to a second threshold value, after determining that the glass washer liquid of the vehicle is in a lacking state, the method further includes:

[0016] When the duration of the lack state is greater than or equal to a third threshold, the driving state of the vehicle is acquired, wherein the driving state of the vehicle includes the vehicle being in one of a straight-line driving state, a stop state, and a turning state.

[0017] Optionally, when the duration of the lack state is greater than or equal to a third threshold, obtaining the driving state of the vehicle includes:

[0018] When the driving state of the automobile is in a straight-line driving state or a stopped state, it is determined that the glass washing liquid of the automobile is in an alarm state and an alarm message is sent to the dashboard of the automobile.

[0019] Optional,

[0020] When the equivalent resistance in the glass washer liquid level sensor is greater than or equal to the second threshold, after determining that the glass washer liquid of the vehicle is in a lack state, the method further includes:

[0021] Detecting the duration of the lack state and acquiring the driving state of the vehicle; when the duration of the lack state is less than a third threshold, or when the driving state of the vehicle is in a turning state, determining that the glass washing liquid of the vehicle is in a sufficient state. According to a second aspect of the present invention, a control device for a glass washing liquid level sensor for a vehicle is provided, comprising:

[0022] An information acquisition module is used to obtain the working condition information of the vehicle;

[0023] a power supply module, configured to start supplying power to the glass washing liquid level sensor when the operating condition information satisfies a first preset condition, and stop supplying power to the glass washing liquid level sensor when the power supply duration of the glass washing liquid level sensor is greater than or equal to a first threshold;

[0024] The detection module is used to obtain a detection signal of the glass washing liquid level sensor when the power supply duration of the glass washing liquid level sensor is less than a first threshold.

[0025] According to a third aspect of the present invention, a control device for the automobile glass washer fluid level sensor according to the second aspect of the present invention is provided.

[0026] The present invention discloses a control method for a glass washer liquid level sensor for an automobile, comprising: obtaining working condition information of an automobile; when the working condition information satisfies a first preset condition, starting to supply power to the glass washer liquid level sensor; when the power supply duration of the glass washer liquid level sensor is less than a first threshold, obtaining a detection signal of the glass washer liquid level sensor; when the power supply duration of the glass washer liquid level sensor is greater than or equal to the first threshold, stopping supplying power to the glass washer liquid level sensor. The control method for a glass washer liquid level sensor for an automobile provided by the present invention selects whether to supply power to the glass washer liquid level sensor by analyzing different working conditions of the automobile. The method can effectively reduce the working time of the glass washer liquid level sensor and reduce the risk of ionization corrosion. The method does not use a complex circuit to realize the alternation of positive and negative poles, simplifies the difficulty of realizing the sensor acquisition circuit, and further reduces the working and time costs of the glass washer liquid level sensor.

[0027] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a flow chart of a control method of a vehicle glass washer fluid level sensor provided by an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of a glass washing liquid level sensor provided by an embodiment of the present invention;

[0031] Figure 3 is a flow chart of another control method of a liquid level sensor for automobile glass washing liquid provided by an embodiment of the present invention;

[0032] Figure 4 This is a flow chart of another control method of a liquid level sensor for automobile glass washing liquid provided by an embodiment of the present invention;

[0033] Figure 5 This is a flow chart of another control method of a liquid level sensor for automobile glass washing liquid provided by an embodiment of the present invention;

[0034] Figure 6 The present invention provides a control device block diagram of a car glass washer fluid level sensor. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0038] Figure 1 This is a flow chart of a control method of a vehicle glass washer fluid level sensor provided by an embodiment of the present invention. Figure 2 is a schematic diagram of a glass washing liquid level sensor provided by an embodiment of the present invention, with reference to Figure 1 and Figure 2 , a control method for a liquid level sensor for a glass washer fluid of an automobile provided by an embodiment of the present invention comprises:

[0039] S1: Obtain the vehicle's operating condition information.

[0040] Specifically, the operating condition information of the vehicle can be obtained in real time through the Electronic Control Unit (ECU).

[0041] S2: When the operating condition information meets the first preset condition, start to supply power to the glass washing liquid level sensor.

[0042] Specifically, the glass washer fluid level sensor installed in the car is a device used to monitor, maintain and measure the fluid level. Figure 2 The positive pole of the glass washer liquid level sensor A is connected to the microcontroller unit (MCU), and the negative pole of the glass washer liquid level sensor A is grounded (GND1) through the body controller (Body Control Module, BCM). The glass washer liquid level sensor A is powered by a controllable power supply and accepts software logic control. At the same time, the voltage and current information of the power supply circuit of the glass washer liquid level sensor A is collected back to the MCU.

[0043] When the liquid level is detected, the glass washer liquid level sensor converts the sensed data into an electrical signal. When the working condition information of the car meets the first preset condition, the glass washer liquid level sensor will be powered, so that the glass washer liquid level sensor detects the water level of the glass washer liquid. Optionally, the first preset condition can be the moment when the voltage state of the car changes from the off state to the power-on state, that is, when the user starts the car in the car, the voltage of the car changes from off to power on, and the glass washer liquid level sensor is powered and the water level of the glass washer liquid is detected, so that the user can understand whether the car glass washer liquid is lacking when starting the car. Or optionally, the first preset condition can be that the voltage state of the car is in the power-on state and the car receives a water spray trigger signal of the glass washer liquid, that is, when the user needs to clean the windshield of the car during driving, the glass washer liquid level sensor is powered at the same time when the glass washer liquid spray function is triggered, so that the glass washer liquid level sensor detects the water level of the glass washer liquid, so that the user can understand whether the car glass washer liquid is lacking at the current moment.

[0044] S3: When the operating condition information does not meet the first preset condition, stop supplying power to the glass washing liquid level sensor.

[0045] Specifically, when the acquired vehicle operating condition information does not meet the first preset condition, the glass washer liquid level sensor is not powered, that is, the glass washer liquid level is not detected.

[0046] S4: When the power supply duration of the glass washing liquid level sensor is less than the first threshold, a detection signal of the glass washing liquid level sensor is obtained.

[0047] Specifically, when the working condition information of the automobile meets the first preset condition, the glass washing liquid level sensor starts to be powered and the timing starts at the same time, and when the power supply duration of the glass washing liquid level sensor is less than the first threshold, the detection signal of the glass washing liquid level sensor for the water level is obtained. Exemplarily, the first threshold may be 2 minutes, and the specific first threshold may be set according to actual needs.

[0048] S5: When the power supply duration of the glass washing liquid level sensor is greater than or equal to the first threshold, stop supplying power to the glass washing liquid level sensor.

[0049] Specifically, when the power supply duration of the glass washing liquid level sensor is greater than or equal to a first threshold, for example, 2 minutes, when the power supply of the glass washing liquid level sensor exceeds 2 minutes, in order to reduce the damage to the glass washing liquid level sensor caused by ionization corrosion, the power supply to the glass washing liquid level sensor is stopped in time.

[0050] A control method for a glass washer liquid level sensor provided in an embodiment of the present invention analyzes specific operating condition information of a car. When the operating condition information meets a first preset condition, the glass washer liquid level sensor starts to be powered. When the operating condition information does not meet the first preset condition, the glass washer liquid level sensor is stopped from being powered, and whether to power the glass washer liquid level sensor is selected according to the power supply duration. This method can effectively reduce the working time of the glass washer liquid level sensor and reduce the risk of ionization corrosion. This method does not use complex circuits to achieve the alternation of positive and negative poles, simplifies the difficulty of implementing the sensor acquisition circuit, and further reduces the working and time costs of the glass washer liquid level sensor.

[0051] Figure 3 is another flow chart of a control method of a vehicle glass washer fluid level sensor provided by an embodiment of the present invention, with reference to Figure 3 Optionally, when the power supply duration of the glass washing liquid level sensor is less than a first threshold, a detection signal of the glass washing liquid level sensor is obtained; including:

[0052] S6: When the equivalent resistance in the glass washer fluid level sensor is less than the second threshold value, it is determined that the glass washer fluid of the vehicle is in a sufficient state.

[0053] Specifically, after the glass washer liquid level sensor is powered, it is necessary to detect the electrical characteristics of the glass washer liquid level sensor at all times, usually by judging the equivalent resistance in the glass washer liquid level sensor. When the equivalent resistance in the glass washer liquid level sensor is less than the second threshold, it is determined that the glass washer liquid of the car is in a sufficient state and there is no need to add the glass washer liquid of the car. Exemplarily, the second threshold can be 1000MΩ. The specific second threshold can be set as needed, and the embodiment of the present invention is not limited to this.

[0054] S7: When the equivalent resistance in the glass washer fluid level sensor is greater than or equal to the second threshold, it is determined that the glass washer fluid of the vehicle is in a shortage state.

[0055] Specifically, after the glass washer liquid level sensor is powered, the electrical characteristics of the glass washer liquid level sensor are detected at all times. When the equivalent resistance in the glass washer liquid level sensor is greater than or equal to the second threshold, it is determined that the glass washer liquid of the vehicle is in a lacking state, and further judgment is needed on the glass washer liquid of the vehicle.

[0056] Figure 4 This is another flow chart of a control method of a vehicle glass washing liquid level sensor provided by an embodiment of the present invention, referring to Figure 4 Optionally, when the equivalent resistance in the glass washer liquid level sensor is greater than or equal to the second threshold, after determining that the glass washer liquid of the vehicle is in a lacking state, the method further includes:

[0057] S8: When the duration of the lack state is greater than or equal to the third threshold, the driving state of the vehicle is obtained, wherein the driving state of the vehicle includes one of the vehicle being in a straight-line driving state, a stop state, and a turning state.

[0058] Specifically, when it is detected that the glass washer liquid level sensor of the automobile is in a missing state, the missing state of the glass washer liquid level sensor is continuously detected. When the duration of the missing state of the glass washer liquid level sensor is greater than or equal to a third threshold, the driving state of the automobile is further obtained. Specifically, the driving state of the automobile can be determined according to the wheel speed and the turn signal control signal of the automobile. The driving state of the automobile includes one of a straight driving state, a stop state and a turning state. Exemplarily, the third threshold can be 10 seconds. The specific third threshold can be set as needed, and the embodiment of the present invention is not limited to this.

[0059] Figure 5 This is another flow chart of a control method of a vehicle glass washing liquid level sensor provided by an embodiment of the present invention, referring to Figure 5 Optionally, when the duration of the missing state is greater than or equal to a third threshold, obtaining the driving state of the vehicle includes:

[0060] S9: When the vehicle is in a straight-line driving state or a stopped state, it is determined that the glass washer fluid of the vehicle is in an alarm state and an alarm message is sent to the vehicle dashboard.

[0061] Specifically, when it is detected that the car is in a straight-line driving state or a stopped state, it is determined that the glass washer fluid of the car is in an alarm state. During the driving of the car, different driving states will affect the vibration of the container containing the glass washer fluid in the car, thereby affecting the judgment of the glass washer fluid level sensor on the glass washer fluid level detection. Therefore, it is necessary to judge the driving state of the car. When it is determined that the glass washer fluid of the car is in an alarm state, an alarm message is sent to the dashboard of the car to remind the user to add the glass washer fluid of the car in time.

[0062] Continue to refer Figure 5 Optionally, when the equivalent resistance in the glass washer liquid level sensor is greater than or equal to a second threshold value, after determining that the glass washer liquid of the vehicle is in a lacking state, the method further includes:

[0063] S10: Detect the duration of the missing state and obtain the driving state of the car.

[0064] Specifically, after it is determined that the glass washer fluid of the vehicle is in a lack state, it is necessary to continue to detect the duration of the lack state and obtain the driving state of the vehicle.

[0065] S11: When the duration of the shortage state is less than the third threshold value, or when the driving state of the vehicle is in a turning state, it is determined that the glass washer fluid of the vehicle is in a sufficient state.

[0066] Specifically, after continuous detection of the lack of glass washer fluid in the car, when the duration of the lack of fluid is less than the third threshold, it can be considered a misjudgment, or when the car is turning, the container containing the glass washer fluid in the car will vibrate due to the turning of the car, which will greatly affect the accuracy of the glass washer fluid level sensor detection. Therefore, at this time, it will be determined that the glass washer fluid of the car is in a sufficient state.

[0067] According to the same inventive concept, Figure 6 This is a block diagram of a control device for a car glass washing liquid level sensor provided by an embodiment of the present invention, with reference to Figure 6 The embodiment of the present invention further provides a control device for a liquid level sensor for a glass washer fluid, comprising:

[0068] Information acquisition module 1, used to obtain the working condition information of the vehicle;

[0069] A power supply module 2, configured to start supplying power to the glass washing liquid level sensor when the operating condition information satisfies a first preset condition, and stop supplying power to the glass washing liquid level sensor when the power supply duration of the glass washing liquid level sensor is greater than or equal to a first threshold;

[0070] The detection module 3 is used to obtain a detection signal of the glass washing liquid level sensor when the power supply duration of the glass washing liquid level sensor is less than a first threshold.

[0071] The control device of the automobile glass washer fluid level sensor provided in the embodiment of the present invention can achieve the same technical effect as the control method of the automobile glass washer fluid level sensor described in the above-mentioned embodiment of the invention, and the embodiment of the present invention will not be described in detail here.

[0072] According to the same inventive concept, an embodiment of the present invention further provides a vehicle, comprising a control device for the automobile glass washer fluid level sensor as described in the above-mentioned embodiment of the invention.

[0073] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method for a liquid level sensor for automobile glass washing liquid, characterized in that: include: Obtain the vehicle's operating condition information; When the operating condition information satisfies a first preset condition, power is supplied to the glass washing liquid level sensor; When the power supply duration of the glass washing liquid level sensor is less than a first threshold, acquiring a detection signal of the glass washing liquid level sensor; When the power supply duration of the glass washing liquid level sensor is greater than or equal to a first threshold, the power supply to the glass washing liquid level sensor is stopped.

2. The control method of the automobile glass washing liquid level sensor according to claim 1, characterized in that: The first preset condition includes the moment when the voltage state of the vehicle changes from the off state to the power-on state.

3. The control method of the automobile glass washing liquid level sensor according to claim 1, characterized in that: The first preset condition includes that the voltage state of the vehicle is in a power-on state and the vehicle receives a water spray trigger signal of the glass washer fluid.

4. The control method of the automobile glass washing liquid level sensor according to claim 1, characterized in that: When the power supply duration of the glass washing liquid level sensor is less than a first threshold, obtaining a detection signal of the glass washing liquid level sensor includes: When the equivalent resistance in the glass washer fluid level sensor is less than a second threshold, it is determined that the glass washer fluid of the vehicle is in a sufficient state.

5. The control method of the automobile glass washing liquid level sensor according to claim 4, characterized in that: When the power supply duration of the glass washing liquid level sensor is less than a first threshold, obtaining a detection signal of the glass washing liquid level sensor, further comprising: When the equivalent resistance in the glass washer fluid level sensor is greater than or equal to a second threshold, it is determined that the glass washer fluid of the vehicle is in a shortage state.

6. The control method of the automobile glass washing liquid level sensor according to claim 5, characterized in that: When the equivalent resistance in the glass washer liquid level sensor is greater than or equal to the second threshold, after determining that the glass washer liquid of the vehicle is in a lack state, the method further includes: When the duration of the lack state is greater than or equal to a third threshold, the driving state of the vehicle is acquired, wherein the driving state of the vehicle includes the vehicle being in one of a straight-line driving state, a stop state, and a turning state.

7. The control method of the automobile glass washing liquid level sensor according to claim 6, characterized in that: When the duration of the lack state is greater than or equal to a third threshold, obtaining the driving state of the vehicle includes: When the driving state of the automobile is in a straight-line driving state or a stopped state, it is determined that the glass washing liquid of the automobile is in an alarm state and an alarm message is sent to the dashboard of the automobile.

8. The control method of the automobile glass washing liquid level sensor according to claim 6, characterized in that: When the equivalent resistance in the glass washer liquid level sensor is greater than or equal to the second threshold, after determining that the glass washer liquid of the vehicle is in a lack state, the method further includes: Detecting the duration of the lack state and obtaining the driving state of the vehicle; When the duration of the absence state is less than a third threshold, or When the driving state of the vehicle is in a turning state, it is determined that the glass washer fluid of the vehicle is in a sufficient state.

9. A control device for a liquid level sensor for automobile glass washing liquid, characterized in that: include: An information acquisition module is used to obtain the working condition information of the vehicle; a power supply module, configured to start supplying power to the glass washing liquid level sensor when the operating condition information satisfies a first preset condition, and stop supplying power to the glass washing liquid level sensor when the power supply duration of the glass washing liquid level sensor is greater than or equal to a first threshold; The detection module is used to obtain a detection signal of the glass washing liquid level sensor when the power supply duration of the glass washing liquid level sensor is less than a first threshold.

10. A vehicle, characterized in that: A control device comprising the automobile glass washer fluid level sensor as claimed in claim 9.

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